Having a strong, distinctive taste or flavor.
From 'flavor' plus the suffix '-ous' (from Latin '-osus'), which means 'full of' or 'characterized by'. This is an older or more literary way to say 'flavorful' or 'flavory'.
English uses both '-ous' and '-ful' to mean 'full of something,' but '-ous' sounds more formal and scientific (like 'dangerous' vs. 'danger-full'), which is why you'd see 'flavorous' in old cookbooks!
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